The term 'CAST LOOSE' can be broken down into three separate words: ILKA (4 letters), ENDS (4 letters), and FREE (4 letters). ILKA is a German female given name, derived from the Germanic word for 'ENTIRE' or 'UNIVERSAL'. ENDS is a verb meaning to bring or come to a conclusion. FREE is an adjective meaning not under the control of another. Therefore, when combined, the phrase 'CAST LOOSE' can be interpreted as liberating oneself from the control of another.